B01D 2239/02
Types of fibres, filaments or particles, self-supporting or supported materials
B01D2239/02 (Types of fibres, filaments or particles, self-supporting or supported materials) appears on 799 US grants and 1,300 published applications in this corpus.
Search patents in B01D- Granted patents
- 799
- Published applications
- 1,300
- Assignees
- 616
- Inventors
- 2,621
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 9 | 0 |
| 1996 | 8 | 0 |
| 1997 | 16 | 0 |
| 1998 | 16 | 0 |
| 1999 | 20 | 0 |
| 2000 | 14 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 8 |
| 2003 | 5 | 11 |
| 2004 | 10 | 21 |
| 2005 | 7 | 12 |
| 2006 | 11 | 19 |
| 2007 | 8 | 40 |
| 2008 | 10 | 35 |
| 2009 | 14 | 33 |
| 2010 | 8 | 55 |
| 2011 | 27 | 46 |
| 2012 | 32 | 35 |
| 2013 | 27 | 37 |
| 2014 | 26 | 39 |
| 2015 | 28 | 37 |
| 2016 | 19 | 50 |
| 2017 | 18 | 46 |
| 2018 | 23 | 56 |
| 2019 | 33 | 62 |
| 2020 | 47 | 80 |
| 2021 | 49 | 114 |
| 2022 | 42 | 123 |
| 2023 | 47 | 157 |
| 2024 | 54 | 73 |
| 2025 | 75 | 63 |
| 2026 | 40 | 47 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2239/025Comprising nanofibresIndexing code316
- B01D 2239/0216Bicomponent or multicomponent fibresIndexing code283
- B01D 2239/0241Comprising electrically conductive fibres or particlesIndexing code117
- B01D 2239/0258Comprising nanoparticlesIndexing code103
- B01D 2239/0208Single-component fibresIndexing code80
- B01D 2239/0266Comprising biodegradable or bio-soluble polymersIndexing code45
- B01D 2239/0283Comprising filter materials made from waste or recycled materialsIndexing code23
- B01D 2239/0291Comprising swelling polymersIndexing code15
All 9 subgroupsShow fewer
Recent patents
- Two stage filter cartridge with an expandable frame facilitating replacement of the filter media1 Sep 2026US 12,722,105 B2Nanodocks Technology Limited
- High efficiency synthetic filter media1 Sep 2026US 12,722,107 B2Knowlton Technologies, LLC
- Melt-blown nonwoven fabric, method of producing the same, layered body, filter for face mask, and face mask25 Aug 2026US 12,716,153 B2Kaneka Corporation
- Anti-microbial filter18 Aug 2026US 12,708,690 B2Acell Industries Limited
- Honeycomb structure and method for manufacturing same18 Aug 2026US 12,709,829 B2Tohoku University
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Method for preparing a composite filter medium and the composite filter medium obtained with this method1 Oct 2026US 2026/0295484 A1Saati S.P.A.
- Vortical cross-flow filtration system10 Sep 2026US 2026/0263971 A1Cleanr Inc.
- Permeate carrier with circular double knit fabric27 Aug 2026US 2026/0249217 A1Lear Corporation
- Device for aquatic microplastics removal20 Aug 2026US 2026/0242250 A1PolyGone Systems, Inc.
Most cited
By later US patents
- Web of blended microfibers and crimped bulking fibers445US 4,118,531 AMinnesota Mining and Manufacturing Company · 1978
- Bicomponent fibers and webs made therefrom302US 4,795,668 AMinnesota Mining and Manufacturing Company · 1989
- Method of charging electret filter media289US 5,496,507 AMinnesota Mining and Manufacturing Company · 1996
- Strong nonwoven fabrics from engineered multiconstituent fibers282US 5,108,827 AFiberweb North America, Inc. · 1992
- Polymer, polymer microfiber, polymer nanofiber and applications including filter structures252US 6,743,273 B2Donaldson Company, Inc. · 2004